Photon Emission from a Time-Varying Dielectric Medium in a Cavity.

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  • Saito Hiroki
    Department of Physics, Faculty of Science and Technology, Keio University, Hiyoshi 3–14–1, Kohoku–ku, Yokohama 223
  • Hyuga Hiroyuki
    Department of Physics, Faculty of Science and Technology, Keio University, Hiyoshi 3–14–1, Kohoku–ku, Yokohama 223

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  • Photon Emission from a Time-Varying Die

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Field evolution in a cavity including a time-varying dielectric is studied by determining the effective Hamiltonian. For a uniform dielectric, the Hamiltonian is obtained explicitly, and we use it to discuss photon creation in the case of an oscillating dielectric constant. It is shown that the mode amplification is similar to that in the case of a moving mirror, but the intermode transition is suppressed. This property enables us to amplify a selected mode alone, unlike in the moving mirror case.

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